good morning to you. >> reporter: good morning to you. negative ads were blanketing the airwaves in those key swing states, including one featuring big bird, which ridicules mitt romney after he said it's not worth borough money from china to fund, among other things, pbs. today both candidates are back out there burning up the campaign trail. president obama is urging supporters to get almost obsessive about his re-election. >> so i need you in this election the next 29 days. we cannot afford to be complacent. >> reporter: the president wrapped up a california fundraising blitz in san francisco. he asked donors to send e-mails and make phone calls to people in swing states who will decide the election. >> we have to understand that we've got a lot more to do, and if we don't do it, then change won't happen. >> reporter: republican nominee mitt romney heads to middle america today for more campaign rallies. last week's debate re-energized his campaign, and now he has the numbers to prove it. in a pew research center poll last month, romne